Langer's Sudoku Assistant

Invalid Sudoku!

Row 6 is invalid. Column 7 is invalid. The middle left 3x3 Box is invalid. Go back and make a different choice.

 

2
7
9
4
1
5
3
8
6
5
8
1
6
7
3
2
9
4
4
6
3
8
9
2
7
5
1
       
   5   
7      
4
8
6
5
1
6
3
2
9
3
       
   5   
7      
4
2
       
   5   
7      
8
1
6
1
2
6
9
3
8
5
7
4
1
9
7
8
2
4
       
   5   
      9
6
3
3
6
8
1      
       
7      
5
9
1      
       
7      
4
2
2
4
5
6
1
1      
       
7      
7
8
1      
   5   
7     9

 

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